Green Building Forum - Pipes in Screed Mon, 17 Aug 2026 02:16:47 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296044#Comment_296044 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296044#Comment_296044 Wed, 27 Apr 2022 22:00:11 +0100 Victorianeco
What are the regs. on running plastic pipe in the screed in one straight run with no joints underground?

This is replacing a previous leaking copper pipe

Thanks in advance]]> Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296046#Comment_296046 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296046#Comment_296046 Thu, 28 Apr 2022 09:24:02 +0100 Dominic Cooney Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296047#Comment_296047 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296047#Comment_296047 Thu, 28 Apr 2022 09:29:14 +0100 Dominic Cooney Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296050#Comment_296050 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296050#Comment_296050 Thu, 28 Apr 2022 12:36:13 +0100 Victorianeco
I wonder if there is a minimum depth within the screed or can we tile over...]]> Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296051#Comment_296051 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296051#Comment_296051 Thu, 28 Apr 2022 13:02:44 +0100 revor Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296052#Comment_296052 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296052#Comment_296052 Thu, 28 Apr 2022 17:43:45 +0100 Dominic Cooney The hot & cold supplies do diverge a bit on the way! (the cold goes via the toilet cistern)
the depth here is at least 50mm because there is a brick floor as the surface, probably more like 60 - 70mm below the surface with the screed.]]> Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296053#Comment_296053 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296053#Comment_296053 Thu, 28 Apr 2022 19:44:49 +0100 fostertom Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296054#Comment_296054 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296054#Comment_296054 Thu, 28 Apr 2022 20:04:39 +0100 Peter_in_Hungary Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296055#Comment_296055 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296055#Comment_296055 Thu, 28 Apr 2022 20:11:14 +0100 djh Posted By: fostertomI know it feels worrying but if UFH pipes can go unconduited, what's the rationale for H&C? Actually they just don't leak (do they?) and do we really want to pull them out one day? I wouln't rely on conduit as Hot insulation.It's really the other way around. You want to run everything in conduits but it's not sensible for UFH pipes because you care more that they are closely coupled to the slab in which they are embedded. (And also because they follow a very convoluted path so couldn't easily be pulled out)

Depending on the hardness of the water you might want to change a DHW pipe before its structure degrades, and the structure will likely degrade within the lifetime of the building anyway. We've all seen surface mounted pipes in older buildings.

Building regs and the associated compliance guide require hot water pipes to be insulated. PH also requires the cold pipe to be insulated, FWIW.]]> Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296056#Comment_296056 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296056#Comment_296056 Thu, 28 Apr 2022 20:40:47 +0100 fostertom Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296057#Comment_296057 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296057#Comment_296057 Thu, 28 Apr 2022 21:29:06 +0100 Victorianeco
Could you run 10mm to whb across a 2m distance t'd from a 15mm?]]> Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296059#Comment_296059 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296059#Comment_296059 Fri, 29 Apr 2022 07:27:54 +0100 revor Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296062#Comment_296062 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296062#Comment_296062 Fri, 29 Apr 2022 09:29:47 +0100 borpin Posted By: VictorianecoCould you run 10mm to whb across a 2m distance t'd from a 15mm?For a HB, 10mm will be more than enough. Also means it will run colder quicker.]]> Pipes in Screed https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296063#Comment_296063 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17460&Focus=296063#Comment_296063 Fri, 29 Apr 2022 10:42:59 +0100 Dominic Cooney